Part A
AD7609BSTZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7244 PCS
- Package
- LQFP-64
- Series
- Data Acquisition - ADCs-DACs - Special Purpose
Replacement verdict
Compatible functional replacement candidate
The AD7609BSTZ is a viable functional replacement candidate for the AD7606BSTZ in many designs, as both share the same 64-lead LQFP footprint, 16-bit SAR architecture, and parallel/serial interface. However, the AD7609 provides true differential inputs with a fixed ±10 V range, whereas the AD7606 offers single-ended inputs with selectable ±5 V or ±10 V ranges, so input configuration and front-end scaling must be revalidated before substitution.
Package and Pinout
High match
Resolution and Channel Count
High match
Input Configuration
Validation required
Analog Input Range
Validation required
Parts at a glance
Part B
AD7606BSTZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4502 PCS
- Package
- LQFP-64
- Series
- Data Acquisition - ADCs-DACs - Special Purpose
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7606BSTZ | AD7609BSTZ | Why it matters |
|---|---|---|---|
| Number of ADC Channels | 8 | 8 | Both devices provide 8 simultaneous-sampling channels, so channel count is not a differentiator for substitutability. |
| Resolution | 16 bits | 18 bits | The AD7609 offers 2 extra bits of resolution, giving finer LSB size and better dynamic range, which matters for high-precision measurement applications. |
| Input Type | Single-ended | True differential | Differential inputs improve common-mode noise rejection and allow direct interface to differential sensors, so the two parts are not functionally interchangeable at the analog front end. |
| Throughput Rate (max) | 200 kSPS | 200 kSPS | Identical maximum sampling rate means timing and throughput budgets remain the same when swapping parts. |
| Analog Input Range | ±5 V or ±10 V (selectable) | ±10 V or ±5 V (selectable) | Both support the same selectable bipolar ranges, so sensor scaling and protection networks can be reused. |
| Supply Voltage | 5 V single supply (with on-chip charge pump) | 5 V single supply (with on-chip charge pump) | Same single 5 V supply simplifies power design and allows drop-in replacement from a power standpoint. |
| On-Chip Input Clamp / Overvoltage Protection | Yes (±16.5 V clamp) | Yes (±16.5 V clamp) | Both provide analog input clamp protection, reducing external protection circuitry requirements equally. |
| Digital Interface | SPI / parallel (selectable) | SPI / parallel (selectable) | Identical interface options allow the same host MCU/FPGA connection to be reused. |
| Package | 64-lead LQFP | 64-lead LQFP | Same package and pinout family supports PCB layout reuse, though pin function differences must be verified. |
| SNR (typical) | ~95 dB | ~100 dB | Higher SNR on the AD7609 benefits low-level signal acquisition; the difference affects achievable measurement accuracy. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7609BSTZ | AD7606BSTZ |
|---|---|---|
| Part Status | Active | Active |
| Type | Data Acquisition System (DAS), ADC | Data Acquisition System (DAS), ADC |
| Number of Channels | 8 | 8 |
| Resolution(Bits) | 18 b | 16 b |
| Sampling Rate(Per Second) | 200k | 200k |
| Data Interface | SPI, DSP | DSP, MICROWIRE™, Parallel, QSPI™, Serial, SPI™ |
| Voltage Supply Source | Analog and Digital | Analog and Digital |
| Voltage - Supply | 2.3V ~ 5V, 4.75V ~ 5.25V | 2.3V ~ 5.25V, 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary differences between the AD7606BSTZ and AD7609BSTZ?
The AD7606BSTZ is an 8-channel, 16-bit, bipolar-input simultaneous-sampling ADC, while the AD7609BSTZ is an 8-channel, 18-bit, true-differential-input simultaneous-sampling ADC. Both are pin-compatible in the same 64-lead LQFP package, but the AD7609 offers higher resolution (18-bit vs 16-bit) and true differential inputs, whereas the AD7606 provides single-ended bipolar inputs.
Are the AD7606BSTZ and AD7609BSTZ pin-compatible?
Yes. Both devices are offered in the same 64-lead LQFP package (STZ suffix) and share a common pinout, which allows the AD7609BSTZ to be used as a higher-resolution upgrade path on an existing AD7606BSTZ footprint, subject to verification of all electrical and timing specifications against the respective datasheets.
What is the resolution and input configuration of each device?
The AD7606BSTZ provides 16-bit resolution with eight single-ended bipolar input channels. The AD7609BSTZ provides 18-bit resolution with eight true-differential bipolar input channels. Both feature on-chip input clamping, track-and-hold, and an internal reference.
Do both parts support the same analog input voltage range?
Both devices support bipolar analog input ranges of ±10 V and ±5 V, selectable via the RANGE pin. The AD7606BSTZ applies these ranges to single-ended inputs, while the AD7609BSTZ applies them to true-differential inputs, so the effective signal swing and common-mode considerations differ between the two.
What are the maximum throughput rates of the AD7606BSTZ and AD7609BSTZ?
Both devices offer a maximum throughput of 200 kSPS per channel for all eight channels sampled simultaneously. The conversion timing and interface behavior are similar, but the AD7609BSTZ requires attention to its 18-bit output word length when configuring the digital interface.
Do both devices use the same digital interface?
Yes. Both the AD7606BSTZ and AD7609BSTZ provide a parallel interface and a serial interface (SPI/QSPI/MICROWIRE/DSP-compatible), selectable via the PAR/SER SEL pin. The serial frame length differs because the AD7609BSTZ outputs 18-bit data per channel versus 16-bit data for the AD7606BSTZ.
Can the AD7609BSTZ directly replace the AD7606BSTZ in an existing design?
Pin compatibility allows a hardware drop-in, but a direct replacement requires validating the digital interface word length (18-bit vs 16-bit), timing, and any firmware or FPGA logic that assumes 16-bit conversion results. The higher resolution and differential input structure of the AD7609BSTZ must be confirmed against the system's signal chain and software.
What are the typical applications for each device?
The AD7606BSTZ is commonly used in power-line monitoring, protection relays, and multi-phase motor control where 16-bit single-ended bipolar acquisition is sufficient. The AD7609BSTZ is suited to applications requiring higher dynamic range and true differential inputs, such as precision power quality analysis, vibration sensing, and industrial instrumentation.